EP0413543B1 - Abrasive body - Google Patents
Abrasive body Download PDFInfo
- Publication number
- EP0413543B1 EP0413543B1 EP90308892A EP90308892A EP0413543B1 EP 0413543 B1 EP0413543 B1 EP 0413543B1 EP 90308892 A EP90308892 A EP 90308892A EP 90308892 A EP90308892 A EP 90308892A EP 0413543 B1 EP0413543 B1 EP 0413543B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal material
- braze alloy
- cemented carbide
- melting point
- tool insert
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
Definitions
- This invention relates to abrasive bodies, particularly abrasive bodies which contain abrasive compacts.
- Abrasive compacts are well known in the art and consist essentially of a mass of abrasive particles present in an amount of at least 70 percent, preferably 80 to 90 percent, by volume of the compact bonded into a hard conglomerate. Compacts are polycrystalline masses and can replace single large crystals in many applications. The abrasive particles will be diamond or cubic boron nitride.
- Diamond compacts will typically contain a second phase uniformly distributed through the diamond mass.
- the second phase may contain a dominant amount of a catalyst/solvent for diamond synthesis such as cobalt, nickel or iron.
- Diamond compacts having second phases of this nature will generally not have thermal stability above 700°C.
- Diamond abrasive compacts may be used alone or as composite compacts in which event they are backed with a cemented carbide substrate.
- Composite diamond abrasive compacts wherein the second phase contains a diamond catalyst/solvent are widely used in industry.
- cubic boron nitride compacts are described in United States Patents US-A- 3,743,489 and US-A- 4,666,466.
- Diamond abrasive compacts of the type described above are thermally sensitive above a temperature of about 700°C. There are, however, described in the literature and in commercial use several diamond abrasive compacts which are thermally stable above 700°C. Examples of such compacts are described in United States Patents US-A- 4,244,380 and US-A- 4,534,773 and British Patent No. 2,158,086.
- a composite abrasive compact particularly a composite diamond abrasive compact
- an elongate cemented carbide pin The product known as a stud cutter is then brazed to the working surface of a drill crown. During this second brazing, weakening of the bond between the composite compact and the pin is known to occur.
- Kennametal South African Patent No. 88/5847 describes a method of bonding an elongate cemented carbide tool insert to the steel body of a conical bit. Bonding is achieved by brazing the carbide to the steel. A perforated metal shim is provided between the carbide and the steel and the braze is allowed to flow through the shim. The presence of the shim is said to reduce stresses in the braze joint. It is to be noted that the bonding is between a carbide surface and a steel surface. Further, the braze alloy is allowed to infiltrate the perforated shim and is not pre-formed with the shim.
- a method of bonding a surface of an abrasive compact or cemented carbide surface to a cemented carbide surface includes the steps of locating a braze alloy having a perforated metal material embedded therein between the surfaces, the braze alloy having a melting point below that of the metal material, urging the surfaces together, raising the temperature of the braze alloy to above its melting point, and allowing the braze alloy to cool and solidify and bond the surfaces together.
- a tool insert comprising an abrasive compact bonded to a cemented carbide substrate, the substrate being bonded to a cemented carbide pin through a braze alloy which has a perforated metal material embedded therein and which has a melting point below that of the metal material.
- the perforated metal material will have a plurality of holes or spaces extending therethrough and which allow for the flow of molten alloy both into the material and through it.
- the size of the holes may vary between wide limits. For example, the largest linear dimension of the holes may range from a few millimetres down to a few hundred microns. Typically, the largest linear dimension of the holes will be in the range of about 3mm to 100 microns. Examples of suitable materials are as follows:
- the metal of the material will be a high melting metal, typically one having a melting point above 1400°C.
- suitable metals are nickel, palladium, platinum, or an alloy containing one or more of these metals or stainless steel.
- the temperature of the braze alloy is not raised too high and to a point where the perforated metal material itself melts.
- the perforated metal material acts, in effect, as a reinforcing agent for the braze bond.
- a subsequent heat treatment as for example, the brazing of the product to the working surface of a tool, it has been found that the shear strength of the braze bond is not significantly reduced when compared with a similar braze bond not including the perforated metal material.
- the perforated metal material is embedded in the braze alloy and located as such between the surfaces to be bonded. It has been found important to limit the degree of oxidation of the metal material which may occur during embedding of the material in the braze alloy. Such oxidation has a deleterious effect on the bond strength, particularly after the bond has been subjected to the effects of a secondary brazing operation.
- the metal material should be substantially free of oxides.
- the method of the invention may be used to bond an abrasive compact surface to a cemented carbide surface. It may also be used to bond a cemented carbide surface to another cemented carbide surface. In this latter form of the invention, the cemented cabide surface will typically form part of a composite abrasive compact of the type described in the above-mentioned prior published specifications.
- the braze alloy will vary according to the nature of the surfaces being bonded and the temperature sensitivity of components carried by, or in close proximity to, the surfaces. As a general rule, the melting point of the braze alloy will not exceed 1000°C. When one of the surfaces being bonded is that of a temperature sensitive diamond compact or where one of the surfaces being bonded is a carbide surface of a composite diamond abrasive compact, then the braze alloy would preferably have a melting point not exceeding 900°C.
- the load which is applied to urge the surfaces being bonded together will typically be in the range 200 to 300 kPa.
- the braze alloy will generally not be maintained at the elevated temperature, i.e. above its melting point, for more than a few minutes. Generally, this elevated temperature will be maintained for a period of less than 1 minute.
- the invention has particular application to the bonding of a composite abrasive compact to an elongate cemented carbide pin.
- a composite abrasive compact to an elongate cemented carbide pin.
- a particularly suitable braze alloy for this application is one which has the following composition, by weight:
- Alloys of this composition have a melting point in the region of 900°C.
- a composite abrasive compact comprising a diamond compact 10 bonded to a cemented carbide support 12.
- the diamond compact has a cobalt second phase and is sensitive to temperatures exceeding about 900°C.
- This composite compact is bonded to an elongate cemented carbide pin 14 to produce a tool component useful for drilling applications. This bonding is achieved by placing a layer 16 of a braze alloy on the upper surface 18 of the pin 14. An expanded nickel mesh 20 is embedded in the braze alloy. The lower surface 22 of the carbide support 12 is then brought into contact with the braze alloy. A load is applied to the composite compact and the pin to urge the surfaces 18 and 22 together.
- Localised heating is applied to the braze alloy, for example by induction heating, to raise the temperature of the braze alloy to above its melting point. At this temperature, the nickel mesh remains solid and the alloy flows and wets the surfaces 18, 22. The elevated temperature is maintained for a period of 3 to 5 seconds and then removed. The alloy cools and solidifies and bonds the surfaces 22 and 18 together. An extremely strong bond results and this bond is not seriously weakened when the bonded product is subsequently brazed into the working surface of an appropriate drill crown.
- Bonded products as described with reference to Figure 1 were produced using a variety of perforated metal materials.
- the perforated metal material was embedded in a braze alloy consisting of 53% copper, 29% manganese, 14,5% gold and 3,5% nickel, all percentages being by weight.
- the bond strength was determined both as brazed and after the product had been subjected to a secondary brazing cycle of being heated to 700°C and held at this temperature for two hours.
- Products 1 and 2 are not according to the invention.
- the remaining products are according to the invention. It will be noted that the shear strengths of the bonds after heat treatment in the case of the bonded products of the invention are superior to those of the bonded products 1 and 2 which are not according to the invention.
Abstract
Description
- This invention relates to abrasive bodies, particularly abrasive bodies which contain abrasive compacts.
- Abrasive compacts are well known in the art and consist essentially of a mass of abrasive particles present in an amount of at least 70 percent, preferably 80 to 90 percent, by volume of the compact bonded into a hard conglomerate. Compacts are polycrystalline masses and can replace single large crystals in many applications. The abrasive particles will be diamond or cubic boron nitride.
- Diamond compacts will typically contain a second phase uniformly distributed through the diamond mass. The second phase may contain a dominant amount of a catalyst/solvent for diamond synthesis such as cobalt, nickel or iron. Diamond compacts having second phases of this nature will generally not have thermal stability above 700°C.
- Diamond abrasive compacts may be used alone or as composite compacts in which event they are backed with a cemented carbide substrate. Composite diamond abrasive compacts wherein the second phase contains a diamond catalyst/solvent are widely used in industry.
- Examples of composite diamond abrasive compacts are described in United States Patent Specification US-A- 3,745,623 and British Patent Specification GB-A- 1,489,130 defining the closest prior art.
- Examples of cubic boron nitride compacts are described in United States Patents US-A- 3,743,489 and US-A- 4,666,466.
- Diamond abrasive compacts of the type described above are thermally sensitive above a temperature of about 700°C. There are, however, described in the literature and in commercial use several diamond abrasive compacts which are thermally stable above 700°C. Examples of such compacts are described in United States Patents US-A- 4,244,380 and US-A- 4,534,773 and British Patent No. 2,158,086.
- In some applications, particularly for drilling, it is desirable to bond a composite abrasive compact, particularly a composite diamond abrasive compact, to an elongate cemented carbide pin. The product known as a stud cutter is then brazed to the working surface of a drill crown. During this second brazing, weakening of the bond between the composite compact and the pin is known to occur.
- Kennametal South African Patent No. 88/5847 describes a method of bonding an elongate cemented carbide tool insert to the steel body of a conical bit. Bonding is achieved by brazing the carbide to the steel. A perforated metal shim is provided between the carbide and the steel and the braze is allowed to flow through the shim. The presence of the shim is said to reduce stresses in the braze joint. It is to be noted that the bonding is between a carbide surface and a steel surface. Further, the braze alloy is allowed to infiltrate the perforated shim and is not pre-formed with the shim.
- According to the present invention, a method of bonding a surface of an abrasive compact or cemented carbide surface to a cemented carbide surface includes the steps of locating a braze alloy having a perforated metal material embedded therein between the surfaces, the braze alloy having a melting point below that of the metal material, urging the surfaces together, raising the temperature of the braze alloy to above its melting point, and allowing the braze alloy to cool and solidify and bond the surfaces together.
- Further according to the invention, there is provided a tool insert comprising an abrasive compact bonded to a cemented carbide substrate, the substrate being bonded to a cemented carbide pin through a braze alloy which has a perforated metal material embedded therein and which has a melting point below that of the metal material.
- Figure 1 illustrates a sectional side view of an assembly being bonded by the method of the invention,
- Figures 2 to 4 illustrate plan views of examples of perforated metal materials useful in the practise of the invention, and
- Figure 5 illustrates graphically results of certain tests carried out.
- The perforated metal material will have a plurality of holes or spaces extending therethrough and which allow for the flow of molten alloy both into the material and through it. The size of the holes may vary between wide limits. For example, the largest linear dimension of the holes may range from a few millimetres down to a few hundred microns. Typically, the largest linear dimension of the holes will be in the range of about 3mm to 100 microns. Examples of suitable materials are as follows:
- 1.
- A metal sheet having holes punched or formed therethrough in a regular or random pattern. An example of such a material is illustrated by Figure 2 and consists of a
metal sheet 30 having a plurality ofcircular holes 32 punched through it. - 2.
- An expanded metal mesh. An example of such a mesh is illustrated by Figure 3 and consists of a plurality of
metal strands 34 in a metal structure defining spaces orholes 36 between adjacent strands. - 3.
- A woven metal net. An example of such a net is illustrated by Figure 4 and consists of a series of
strands 40 woven to form a net structure. Holes orspaces 42 are defined betweenadjacent strands 40. - The metal of the material will be a high melting metal, typically one having a melting point above 1400°C. Examples of suitable metals are nickel, palladium, platinum, or an alloy containing one or more of these metals or stainless steel.
- It is preferred that the temperature of the braze alloy is not raised too high and to a point where the perforated metal material itself melts.
- The perforated metal material acts, in effect, as a reinforcing agent for the braze bond. When the bonded product is subjected to a subsequent heat treatment, as for example, the brazing of the product to the working surface of a tool, it has been found that the shear strength of the braze bond is not significantly reduced when compared with a similar braze bond not including the perforated metal material.
- The perforated metal material is embedded in the braze alloy and located as such between the surfaces to be bonded. It has been found important to limit the degree of oxidation of the metal material which may occur during embedding of the material in the braze alloy. Such oxidation has a deleterious effect on the bond strength, particularly after the bond has been subjected to the effects of a secondary brazing operation. The metal material should be substantially free of oxides.
- The method of the invention may be used to bond an abrasive compact surface to a cemented carbide surface. It may also be used to bond a cemented carbide surface to another cemented carbide surface. In this latter form of the invention, the cemented cabide surface will typically form part of a composite abrasive compact of the type described in the above-mentioned prior published specifications.
- The braze alloy will vary according to the nature of the surfaces being bonded and the temperature sensitivity of components carried by, or in close proximity to, the surfaces. As a general rule, the melting point of the braze alloy will not exceed 1000°C. When one of the surfaces being bonded is that of a temperature sensitive diamond compact or where one of the surfaces being bonded is a carbide surface of a composite diamond abrasive compact, then the braze alloy would preferably have a melting point not exceeding 900°C.
- The load which is applied to urge the surfaces being bonded together will typically be in the
range 200 to 300 kPa. - The braze alloy will generally not be maintained at the elevated temperature, i.e. above its melting point, for more than a few minutes. Generally, this elevated temperature will be maintained for a period of less than 1 minute.
- The invention has particular application to the bonding of a composite abrasive compact to an elongate cemented carbide pin. In this form of the invention, there will be bonding between a carbide surface of the composite compact and a surface of the pin. A particularly suitable braze alloy for this application is one which has the following composition, by weight:
- Mn
- 15 to 41 %
- Cu
- 67 to 41 %
- Ni
- 1 to 5 %
- Au
- 10 to 17 %
- Alloys of this composition have a melting point in the region of 900°C.
- An embodiment of the invention will now be described with reference to Figure 1 of the accompanying drawing. Referring to this drawing, there is shown a composite abrasive compact comprising a diamond compact 10 bonded to a cemented
carbide support 12. The diamond compact has a cobalt second phase and is sensitive to temperatures exceeding about 900°C. This composite compact is bonded to an elongate cementedcarbide pin 14 to produce a tool component useful for drilling applications. This bonding is achieved by placing a layer 16 of a braze alloy on the upper surface 18 of thepin 14. An expandednickel mesh 20 is embedded in the braze alloy. Thelower surface 22 of thecarbide support 12 is then brought into contact with the braze alloy. A load is applied to the composite compact and the pin to urge thesurfaces 18 and 22 together. Localised heating is applied to the braze alloy, for example by induction heating, to raise the temperature of the braze alloy to above its melting point. At this temperature, the nickel mesh remains solid and the alloy flows and wets thesurfaces 18, 22. The elevated temperature is maintained for a period of 3 to 5 seconds and then removed. The alloy cools and solidifies and bonds thesurfaces 22 and 18 together. An extremely strong bond results and this bond is not seriously weakened when the bonded product is subsequently brazed into the working surface of an appropriate drill crown. - Bonded products as described with reference to Figure 1 were produced using a variety of perforated metal materials. In each case, the perforated metal material was embedded in a braze alloy consisting of 53% copper, 29% manganese, 14,5% gold and 3,5% nickel, all percentages being by weight. The bond strength was determined both as brazed and after the product had been subjected to a secondary brazing cycle of being heated to 700°C and held at this temperature for two hours.
- These bonded products were compared with similar products produced using the same braze alloy without any perforated metal material and a similar product using the same braze alloy and a solid nickel shim.
- The shear strengths of the bond (in MPa) for each product, both as brazed and after heat treatment, are set out graphically in the attached Figure 5. In this figure, the various bonded products, identified by their bonding layers, are as follows:
- 1.
- Braze alloy without a perforated metal material.
- 2.
-
Solid nickel shim 0,1mm thick. - 3.
- Perforated Ni-
shim 0,1mm thick. - 4.
- Perforated Ni-
shim 0,1mm thick. - 5.
- Woven Hi-
net 0,15mm thick. - 6.
- Expanded Ni-
mesh 0,2mm thick. - 7.
- Fine mesh, expanded nickel.
- 8.
- Coarse mesh, expanded nickel.
- 9.
- Fine mesh, expanded stainless steel.
- 10.
- Coarse mesh, expanded stainless steel.
- 11, 12.
- Oxide free alloy with woven nickel net centre layer.
-
Products products
Claims (18)
- A method of bonding a surface of an abrasive compact or a cemented carbide surface (22) to a cemented carbide surface (18), characterised in that it includes the steps of locating a braze alloy (16) having a perforated metal material (20) embedded therein between the surfaces (18, 22), the braze alloy (16) having a melting point below that of the metal material (20), urging the surfaces (18, 22) togerher, raising the temperature of the braze alloy (16) to above its melting point, and allowing the braze alloy (16) to cool and solidify and bond the surfaces (18, 22) together.
- A method according to claim 1 wherein the temperature is raised to a point at which the braze alloy (16) melts, but at which the metal material (20) does not melt.
- A method according to claim 1 or claim 2 wherein a surface of a diamond abrasive compact is bonded to a cemented carbide surface (18).
- A method according to claim 1 or claim 2 wherein a cemented carbide surface (22) of a composite diamond abrasive compact (10, 12) is bonded to another cemented carbide surface (18).
- A method according to claim 3 or claim 4 wherein the braze alloy (16) has a melting point not exceeding 900°C.
- A method according to any one of the preceding claims wherein the perforated metal material (20) is selected from a sheet (30) having holes (32) formed therein, an expanded metal mesh (34) and a metal net (40).
- A method according to any one of the preceding claims wherein the perforated metal material (20) is substantially free of any oxides.
- A method according to any one of the preceding claims wherein the metal of the perforated metal material (20) is selected from nickel, palladium and platinum and alloys containing one or more of these metals.
- A method according to any one of claims 1 to 8 wherein the metal of the perforted metal material (20) is stainless steel.
- A method according to any one of the preceding claims wherein the braze alloy (16) has the following composition, by weight:Mn 15 to 41 %Cu 67 to 41 %Ni 1 to 5 %Au 10 to 17 %
- A tool insert comprising an abrasive compact (10) bonded to a cemented carbide substrate (12), characterised in that the substrate (12) is bonded to a cemented carbide pin (14) through a braze alloy (16) which has a perforated metal material (20) embedded therein and which has a melting point below that of the metal material (20).
- A tool insert according to claim 11 wherein the abrasive compact (10) is a diamond abrasive compact (10).
- A tool insert according to claim 11 or claim 12 wherein the braze alloy (16) has a melting point not exceeding 900°C.
- A tool insert according to any one of claims 11 to 13 wherein the braze alloy (16) has the following composition, by weight:Mn 15 to 41 %Cu 67 to 41 %Ni 1 to 5 %Au 10 to 17 %
- A tool insert according to any one of claims 11 to 14 wherein the perforated metal material (20) is selected from a sheet (30) having holes (32) formed therein, an expanded metal mesh (34) and a metal net (40).
- A tool insert according to any one of claims 11 to 15 wherein the perforated metal material (20) is substantially free of any oxides.
- A tool insert according to any one of claims 11 to 16 wherein the metal of the perforated metal material (20) is selected from nickel, palladium, and platinum and alloys containing one or more of these metals.
- A tool insert according to any one of claims 11 to 16 wherein the metal of the perforated metal material (20) is stainless steel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90308892T ATE95744T1 (en) | 1989-08-14 | 1990-08-13 | GRINDING BODY. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA896181 | 1989-08-14 | ||
ZA896181 | 1989-08-14 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0413543A2 EP0413543A2 (en) | 1991-02-20 |
EP0413543A3 EP0413543A3 (en) | 1991-07-31 |
EP0413543B1 true EP0413543B1 (en) | 1993-10-13 |
Family
ID=67542631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90308892A Expired - Lifetime EP0413543B1 (en) | 1989-08-14 | 1990-08-13 | Abrasive body |
Country Status (9)
Country | Link |
---|---|
US (1) | US5161335A (en) |
EP (1) | EP0413543B1 (en) |
JP (1) | JP2602984B2 (en) |
KR (1) | KR910004298A (en) |
AT (1) | ATE95744T1 (en) |
AU (1) | AU634803B2 (en) |
CA (1) | CA2023170A1 (en) |
DE (1) | DE69003907T2 (en) |
IE (1) | IE64568B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9194189B2 (en) | 2011-09-19 | 2015-11-24 | Baker Hughes Incorporated | Methods of forming a cutting element for an earth-boring tool, a related cutting element, and an earth-boring tool including such a cutting element |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5976001A (en) * | 1997-04-24 | 1999-11-02 | Diamond Machining Technology, Inc. | Interrupted cut abrasive tool |
US5919084A (en) * | 1997-06-25 | 1999-07-06 | Diamond Machining Technology, Inc. | Two-sided abrasive tool and method of assembling same |
US6189634B1 (en) | 1998-09-18 | 2001-02-20 | U.S. Synthetic Corporation | Polycrystalline diamond compact cutter having a stress mitigating hoop at the periphery |
US6148938A (en) * | 1998-10-20 | 2000-11-21 | Dresser Industries, Inc. | Wear resistant cutter insert structure and method |
US6528141B1 (en) | 1998-12-15 | 2003-03-04 | Diamond Machining Technology, Inc. | Support structure and method of assembling same |
US6261167B1 (en) | 1998-12-15 | 2001-07-17 | Diamond Machining Technology, Inc. | Two-sided abrasive tool and method of assembling same |
US6402603B1 (en) | 1998-12-15 | 2002-06-11 | Diamond Machining Technology, Inc. | Two-sided abrasive tool |
US6360832B1 (en) * | 2000-01-03 | 2002-03-26 | Baker Hughes Incorporated | Hardfacing with multiple grade layers |
FR2872072B1 (en) * | 2004-06-24 | 2006-09-29 | Snecma Propulsion Solide Sa | METHOD OF BRAZING PARTS OF SILICURE THERMOSTRUCTURAL COMPOSITE MATERIAL |
US7373997B2 (en) * | 2005-02-18 | 2008-05-20 | Smith International, Inc. | Layered hardfacing, durable hardfacing for drill bits |
US8763730B2 (en) * | 2009-05-28 | 2014-07-01 | Smith International, Inc. | Diamond bonded construction with improved braze joint |
US9145603B2 (en) * | 2011-09-16 | 2015-09-29 | Baker Hughes Incorporated | Methods of attaching a polycrystalline diamond compact to a substrate |
US10018056B2 (en) * | 2014-07-02 | 2018-07-10 | United Technologies Corporation | Abrasive coating and manufacture and use methods |
US10012095B2 (en) * | 2014-07-02 | 2018-07-03 | United Technologies Corporation | Abrasive coating and manufacture and use methods |
US10030527B2 (en) * | 2014-07-02 | 2018-07-24 | United Technologies Corporation | Abrasive preforms and manufacture and use methods |
US10786875B2 (en) | 2014-07-02 | 2020-09-29 | Raytheon Technologies Corporation | Abrasive preforms and manufacture and use methods |
DE102019202926A1 (en) * | 2019-03-05 | 2020-09-10 | Siemens Aktiengesellschaft | Two-layer abrasive layer for blade tip, process component and turbine arrangement |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1956233A (en) * | 1931-01-29 | 1934-04-24 | Krupp Ag | Tipped tool and working implement |
GB668810A (en) * | 1949-09-27 | 1952-03-19 | Hard Metals Ltd | Improvements in rock drilling bits having hard metal cutting edges |
DE1151666B (en) * | 1958-11-13 | 1963-07-18 | Philips Nv | Process for producing a titanium-containing silver, copper or silver-copper alloy and using this alloy as a solder |
US3290835A (en) * | 1964-07-28 | 1966-12-13 | Carborundum Co | Segmental abrasive wheel |
US3767371A (en) * | 1971-07-01 | 1973-10-23 | Gen Electric | Cubic boron nitride/sintered carbide abrasive bodies |
US3743489A (en) * | 1971-07-01 | 1973-07-03 | Gen Electric | Abrasive bodies of finely-divided cubic boron nitride crystals |
US3745623A (en) * | 1971-12-27 | 1973-07-17 | Gen Electric | Diamond tools for machining |
US4063909A (en) * | 1974-09-18 | 1977-12-20 | Robert Dennis Mitchell | Abrasive compact brazed to a backing |
US4117968A (en) * | 1975-09-04 | 1978-10-03 | Jury Vladimirovich Naidich | Method for soldering metals with superhard man-made materials |
ZA773813B (en) * | 1977-06-24 | 1979-01-31 | De Beers Ind Diamond | Abrasive compacts |
US4225322A (en) * | 1978-01-10 | 1980-09-30 | General Electric Company | Composite compact components fabricated with high temperature brazing filler metal and method for making same |
US4224380A (en) * | 1978-03-28 | 1980-09-23 | General Electric Company | Temperature resistant abrasive compact and method for making same |
IL59519A (en) * | 1979-03-19 | 1982-01-31 | De Beers Ind Diamond | Abrasive compacts |
DE3014645C2 (en) * | 1980-04-16 | 1982-12-02 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | Metal-ceramic component and process for its manufacture |
US4534773A (en) * | 1983-01-10 | 1985-08-13 | Cornelius Phaal | Abrasive product and method for manufacturing |
DE8509236U1 (en) * | 1984-03-30 | 1985-09-19 | De Beers Industrial Diamond Division (Proprietary) Ltd., Johannesburg, Transvaal | Grinding tool with grinding insert |
US4527998A (en) * | 1984-06-25 | 1985-07-09 | General Electric Company | Brazed composite compact implements |
GB8418481D0 (en) * | 1984-07-19 | 1984-08-22 | Nl Petroleum Prod | Rotary drill bits |
US4605343A (en) * | 1984-09-20 | 1986-08-12 | General Electric Company | Sintered polycrystalline diamond compact construction with integral heat sink |
IE63857B1 (en) * | 1987-07-14 | 1995-06-14 | De Beers Ind Diamond | Method of brazing |
US4821819A (en) * | 1987-08-11 | 1989-04-18 | Kennametal Inc. | Annular shim for construction bit having multiple perforations for stress relief |
US4899922A (en) * | 1988-02-22 | 1990-02-13 | General Electric Company | Brazed thermally-stable polycrystalline diamond compact workpieces and their fabrication |
-
1990
- 1990-08-13 CA CA002023170A patent/CA2023170A1/en not_active Abandoned
- 1990-08-13 EP EP90308892A patent/EP0413543B1/en not_active Expired - Lifetime
- 1990-08-13 DE DE90308892T patent/DE69003907T2/en not_active Expired - Fee Related
- 1990-08-13 AU AU60932/90A patent/AU634803B2/en not_active Ceased
- 1990-08-13 AT AT90308892T patent/ATE95744T1/en not_active IP Right Cessation
- 1990-08-14 KR KR1019900012531A patent/KR910004298A/en active IP Right Grant
- 1990-08-14 US US07/567,135 patent/US5161335A/en not_active Expired - Fee Related
- 1990-08-14 IE IE294590A patent/IE64568B1/en not_active IP Right Cessation
- 1990-08-14 JP JP2215690A patent/JP2602984B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9194189B2 (en) | 2011-09-19 | 2015-11-24 | Baker Hughes Incorporated | Methods of forming a cutting element for an earth-boring tool, a related cutting element, and an earth-boring tool including such a cutting element |
Also Published As
Publication number | Publication date |
---|---|
DE69003907D1 (en) | 1993-11-18 |
ATE95744T1 (en) | 1993-10-15 |
AU634803B2 (en) | 1993-03-04 |
IE64568B1 (en) | 1995-08-23 |
IE902945A1 (en) | 1991-02-27 |
EP0413543A3 (en) | 1991-07-31 |
US5161335A (en) | 1992-11-10 |
AU6093290A (en) | 1991-02-14 |
CA2023170A1 (en) | 1991-02-15 |
DE69003907T2 (en) | 1994-02-10 |
KR910004298A (en) | 1991-03-28 |
EP0413543A2 (en) | 1991-02-20 |
JPH03221374A (en) | 1991-09-30 |
JP2602984B2 (en) | 1997-04-23 |
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